/**
 * Block类    障碍物类
 **/
 function Block(img_url) {
    // 接收数据
    // 数组属性
    this.arr = [
        { x: 8, y: 8},
        { x: 8, y: 9},
        { x: 8, y: 10},
        { x: 9, y: 10},
        { x: 10, y: 10},
        { x: 11, y: 10},
        { x: 12, y: 10},
        { x: 13, y: 10},
        { x: 14, y: 10}
    ];
    // 接收图片
    this.img_url = img_url;
}